Tractor



N. AND L. NILSON.

TRACTOR.

APPLICATION FILED NOV. 12. 1915- '1 ,328,335, Patented Jan. 20, 1920.

UNITED STATES PATENT OFFICE.

NILS NILSON LEONARD NILSON, 0F WAYZATA, MINNESOTA.

TRACTOR.

Original applicationfiled June 5, 1911, Serial No. 631,493. Renewed June 17, 1915, serial No. 34,741.

Specification of Letters Patent.

Divided and this application filed November.12, 1915. I Serial No. 61,117.

To all whom it may concern:

Be it known that we, NILs NILsoN and LEONARD NILSON, citizens of the United- States, residents of Wayzata, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Tractors, of which the following is a specification.

The primary object of our invention is to provide a tractorwith means whereb the draft of the device or implement I ing drawn by the tractor will operate to increase its traction.

A further object is to provide an implement attachment that is capable of convenient application to a traction engine and may be readily removed therefrom for substitution of another draft attachment.

The invention consists'generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.-

In the accompanying drawings forming part of this specification,

Figure 1 is a plan view of a traction machine embodying our invention,

Fig. 2 is a side elevation of the same,

Figs. 3 and 4: are detail views showing the preferred means for connecting plow beams to the frame of the machine when the machine is used for pulling plows.

In the drawing, 2 represents a frame I having a forward axle 3 and carrying wheels 4:. 5 is a source of power mounted on said frame and 6 is a driving shaft actuated by said source ofpower and having a friction wheel 7 slida'bly mounted thereon. -A friction disk 8' is movable toward. and from said wheel 7 and is driven by frictional contact with said wheel. This disk is preferably mounted on a shaft 9 and a spring 10 normally holds it in engagement with said wheel. .The outer end of the shaft 9 may be provided with a pulley 11. 12 is a drive chain connecting the shaft 9 with a'rear traction wheel 13 which is mounted in bearings in the rear portion of the machine frame and a similar belt 14 connects the shaft 9 with a shaft 15 that extends transversely of the machine frame. A yoke 16 is provided to straddle the wheel 13 and is supported at ,its lower ends on the frame of the machine.

Upon this yoke a bar 17 is centrally pivoted, having its forward end adapted to oscillate vertically in a guide 18 having holes 19 into which pins may be thrust for the purpose of locking-the bar in any desired position therein. A cable 20 is attached to the bar 17 and I is adapted to be wound on the shaft 15, one end of the cable being conveniently located with respect to the drivers seat 21, so that the driver may manipulate the bar 17 and regulate the period of lifting the plows. A

frame 21' is mounted on hubs 15and projects rearwardly therefrom and carries a plow-beam guiding mechanism, as will hereinafter appear. Bell cranks 22 are pivoted on the machine frame and connected by rods 23 with a rock shaft 21 having an operatplows 26 having beams 27. The forward ends of the plow beams are pivotally connected with loops 28- which are in turn pivoted on the lugs 29 of a plate 29 and are adapted to rotate, on their pivots and are supported by plates 30 bolted to the frame 21. The plates 30 have a peripheral notch 32 therein adapted to receive a pin 33 on the plate 29. The twisting of the machine, as i in turning, will be compensated for by the rotation of the plates 29' and the pins thereon' will limit the rotary movement of the 'pivotal connections of the beams with the rear portion of the tilting frame.

The beams 27 are provided with a series of holes 34 in which draft chains35 are ad- I justable, said chain's extending to a point above the traction wheel and being connected to the yoke 16 so that the pull of the chains in drawing the plows will tend to draw the yoke downwardly and increase the traction of the wheel. The yoke 16, or other suitable draft-attaching means that may be employed, extends above the axis of the traction wheel and the pull of the draft chains thereon tends to lift the'forward end of the machine frame and facilitate theturmng of the forward carryi ng wheels in guiding the machine, and at the sametime the down-, ward pull "of the draft connectlons exerts a pressure on-the traction wheel to force -1t into the soil and irfcrease the traction. We

are thus able to utilize the power of the machine in drawing the plows, without the quadrants, and one of said draft chains is connected at 43 to the bail 36. The sleeve 38 has an arm 44 thereon connected by a link 45 with the rear end of the bar 17, so that when said bar is tilted the bail 36 will be lifted'and with it the draft chains and the' 'plows, and the varying sizes of the quadrants with .respect to one another and to their connection with the bail are such that the plows, instead of being lifted s'imultane-' ously, will be lifted one at a time as they L approach a predetermined point, so that when all of the plows are lifted out of the .ground the furrows will be of the same length and their ends will be in alinement.

While we have shown the tractor as used for pulling plows, it will be understood that it may be used for pulling other implements or devices, and that wherever used the draft of the implement or device being drawn will increase the traction of the machine. We have, in the foregoing specification, pointed out the preferred .manner which we contemplate using in applying the principle of our invention, but we'do not limit ourselves to the details of construction, the arrangement of the elements herein shown and described, or to the size and pro- .portion of the elements illustrated, as the ,same may be varied in -many particulars without departing from our invention or the scope of the claims herein.

on said frame, and straddling We claim as ourinvention:

1. The combination, with a frame having forward guiding means and a rear traction wheel, of a draft-attaching means secured to said frame and extending above the axis of said wheel, .and a draft means connected with the upper portion of said draft-attaching means, whereby the pull of said draft means upon said attaching means will in-.

crease the traction of said wheel and a beam having a non-draft guiding connection with said frame and a connection with said. draft means in the rear of said guiding connection.

2. The combination, wlth a frame having forward guiding means and a rear traction wheel, of a draft-attaching means mounted Y said wheel, and a draft means connected with said draftattaching means above the axis of said Wheel, whereby'the pull of said draft means upon said attaching means will increase the traction of said wheel, a member having a pivotal non-draft guiding connection with said frame and attached to said draft means in the rear of said guiding connection.

3. The combination, with a frame having forward guiding means and a rear traction wheel and non-draft guiding connections for attachment to the load to be drawn, of a draft means connected with the load and with said frame above the axis of said traction wheel for exerting a downward pressure on said wheel to increase the traction thereof, the connection of said draft means with the load being in the rear of said guiding connections. 4

In' witness whereof, we have hereunto set our hands this 3rd day of Novenrfber, 1915, and 5th day of Nov., 1915.

NILS NIL SON. I LEONARD NILSON.

Witness:

G. W. HELMER. 

